A. Technical appendix
A-19
Festo P.BE-MPA-EN en 1108e
Electric components, MPA-S valve terminal with CPX terminal or CPI interface
Electronics module VMPA...-FB-...
Operating voltage supply for electronic compon-
ents (V
EL/SEN
):
– Nominal voltage
– Internal current consumption at 24 V
(internal electronics, all outputs 0 signal)
24 V DC ± 25 %
type 8 mA
VMPA...-FB-EMG-... VMPA...-FB-EMS-...
Load voltage supply for valves (V
VAL
)
– Nominal voltage
– Internal current consumption at 24 V
(internal electronics, without valves)
– Diagnostic message undervoltage V
VAL
,
load voltage outside function range
DC 24 V ± 25 %
type 23 mA
≤ 17.5 ... 15.5 V
DC 24 V ± 25 %
type 3 mA
≤ 17.5 ... 15.5 V
Current consu mption per s olenoid coil
Load voltage V
VAL
at 24 V
MPA1 MPA2
– Pull current
– with c urrent reduction
58 mA for 24 ms
9mAafter24ms
99 mA for 24 ms
18 mA after 24 ms
Pressure sensor plate
– Current consumption V
EL/SEN
at 24 V
– Accuracy
– Display increments
21 mA
< ± 2.5 % FS (Fullscale)
20 mbar
Proportional-pressure regulator VMPA-…TA...
Operating voltage supply
– Nominal voltage
– Current consumption
24 V DC (permitted residual ripple max. ± 10 %)
Max. 300 mA
Example of current calculation
Current consumption with two solenoid coils MPA2 switched in parallel and one electronics module
without separate circuits:
–I
EL/SEN
= 1 x 8 mA =8 mA
– Current consumption during pick-up phase (24 ms): I
VAL
= 3 mA + 2 x 99 mA = 202 mA
– Current consumption with current reduction: I
VAL
= 3 mA + 2 x 18 mA = 39 mA
Tab. A/11: Technical data on electric components, MPA-S valve terminal with CPX
terminal or CPI module
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